0 0 ...0 10 0 ...2 0.........0 n-1 ...0 0n 0 ...0 0要用定义计算．．． 做不来麻烦会做的GGJJ帮忙拉

2道数独题目,在线等,急7 4 0 0 6 5 0 1 09 0 0 0 0 0 0 6 00 0 3 9 0 4 0 0 02 0 0 0 0 0 0 4 06 0 4 0 0 0 1 0 70 9 0 0 0 0 0 0 30 0 0 3 0 5 6 0 00 1 0 0 0 0 0 0 80 7 0 0 2 8 0 5 10 0 0 0 3 0 0 7 43 0 0 0 0 0 5 9 00 0 0 8 0 9 0 0 20 7 0 5 0 0 9 8 0 0 0 3 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7 0 5 0 0 6 0 0 1 0 0 0 4 9 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 7 0 9 0 0 5 0 0 2 4 0 8 0 0 0 0 0 第一小题：0 0 ...0 10 0 ...2 0.......0 n-1 ...0 0n 0 ...0 0 关于数独求助2 6 0 0 5 0 0 8 10 0 0 8 0 0 0 0 93 0 0 2 0 4 0 0 60 0 0 4 0 5 0 0 70 7 2 0 9 0 0 0 50 0 6 0 0 0 0 9 47 4 0 0 6 2 9 0 00 0 9 7 0 0 0 0 30 0 0 0 4 0 7 0 2这个数独为什么没有解 matlab SVD分解结果X=[1 0 0 1 0 0 0 0 01 0 1 0 0 0 0 0 01 1 0 0 0 0 0 0 00 1 1 0 1 0 0 0 00 1 1 2 0 0 0 0 00 1 0 0 1 0 0 0 00 0 1 1 0 0 0 0 00 1 0 0 0 0 0 0 10 0 0 0 0 1 1 1 00 0 0 0 0 0 1 1 10 0 0 0 0 0 0 1 1];[T,S,D]=svd(X,0)分解后得到的 求行列式的值?2 0 0 0 10 2 0 0 00 0 2 0 00 0 0 2 01 0 0 0 2 (0 (0 -0 ：0 (0 -0- >0 :0 利用初等行变换将其变为最简形矩阵0 1 0 2 0 和 1 0 0 0 00 0 3 6 0 0 0 2 0 10 0 0 0 0 解行列式 0 0 ...0 1 0 0 0 ...2 0 0 ........n-1 0 ..0 0 0 0 0 ..0 0 n 上三角行列式0 0 0 0 0 10 0 0 0 2 *0 0 0 3 * *0 0 4 * * *0 5 * * * *求值相反的下三角这么求呢?0 0 0 0 1 0 0 0 2 *0 0 3 * * 0 4 * * *5 * * * *= a11A11 + a21A21 +a31A31 + a41A41 + a51A51= a51A51 （为什么突然就等于a51A51）= 5 X 求他的逆矩阵a=0 0 0 10 0 2 00 3 0 0a=0 0 0 10 0 2 00 3 0 04 0 0 0